1. Preheat oven to 400 degrees F. Place skillet into the oven to heat up. Add vinegar to measuring cup, and fill with milk to 1 1/2 cups. Sift together all dry ingredients.
2. Pour the oil, 1 cup of the "buttermilk", and the water into the dry ingredients and whisk to combine. The batter should be somewhat thin and puffy (the leavening agents should really be working).
3. If batter is not thin, add the other 1/2 cup "buttermilk". To be honest I always need all 1 1/2 cups. Carefully remove skillet from the oven and spray really well with nonstick spray.
4. Pour the batter into the skillet. Lightly sprinkle sugar on top and bake for 25-35 minutes or until a inserted toothpick comes clean. Let cool for a few minutes and then carefully flip the cornbread onto a plate.
Eat and Enjoy!